Gas burner



J. O. JENSEN June 8, 1937.

GAS BURNER Filed May 9, 1935 ATTORNEYS Patented June 8, 1937 UNITEDSTATES PATENT OFFICE GAS BURNER John OQJensen, (Tlhicago, Ill.Application May 9, 1935, 'SeriaPNo. 20,621 3 Claims. (01. 158-99) Thisinvention relates to a gas burner and is particularly useful inconnection with a heater for dwellings and the like;

An object of the invention is to provide an eflicient gas burner ofsimple and sturdy construction which is extremelyeconomical in fuelconsumption while providing suflicient heat for adwelling or' the like.A further object is to provide a heater which is formed of separableunits enabling it to be quickly and effectively installed in a furnaceadapted to burn coal, coke etc. Other specific objects andadvantages'will appear as the specification proceeds.

The invention is illustrated in a preferred embodiment, by theaccompanying drawing; in

which Figure 1 is an elevational andpart-sectional View of a'burnerembodyingmyinvention; Fig. 2,.

a broken top plan view; Fig. 3, a broken side'ded tail 'viewof thesecondary air control means;

Fig. 4,a detail end view of the, shutter employed; Fig, 5, a side viewin elevation-of the Venturi tube head;- and Fig. 6, a front view inelevation of the Venturi tube head. i

In the illustration given, A designates a burner base supporting aburner head B; C designates a series of deflector units superposed onbase A; and D designates gas supply means.

The base A may be of any suitable construc- 30 tion. In the illustrationgiven, the base A comprises on one side an inlet casing H) which is ofgeneral rectangular shape and forms the walls of a secondary air ductII. The outer end of duct [I is closed bya shutter member 12 which is 5pivotally carried by easing A on pivot l3 and which is provided with alug M to which] Wires or other connecting means are secured, and

through whichthe shutter 12 is automatically controlled. The secondaryair inlet duct H communicates with anan'nular chamber l5 formed asfollows. A circular base l6 supports an outer cylindrical wall I! and aninner cylindrical flange l8 which is spaced from wall H. The. topportion of flange I8 is inwardly stepped at 19 to 5 provide a ledge 20.Upon ledge 20 rests an air equalizing and directing ring 2|.

The burner head B may be of any suitable construction. In theillustration given, it comprises an annular block 22 provided with a de-50 pending attachment flange 23 by which it may be secured by rivets orbolts to the top of wall [1. The head is provided centrally with a gasconduit 24 and communicating with conduit 24 are a series of spacedvertical gas openings 25.

55 On one side of the annular block 22 is a pilot light opening26.Communicating with the conduit 24 are gas pipes which will be describedmore fully hereinafter.

In order to bring about uniformity in the amount of "gas leaving theseveral openings, I prefer to form a partition wall 21 on the side ofthe burner opposite the gas inlet pipes. The partition wall 21completely closes the conduit 24 at the point indicated. 7

The deflector units C are identical in construction. Hence a descriptionof one unit will be sufficient. Referring to the unit 0 resting uponthe'flange l8, it will be noted that the lower portion of thecylindrical wall 28 is provided with an inwardly stepped flange 29 so asto provide an interlocking connection with the stepped portions IQ offlange I8. Wall 28 is flared outwardly at30 and then inwardly to formahorizontalwall portion 3| in the form of a ledge. The extreme end ofthe'wall 29 is directed upwardly at 32. Between the outwardly flaredwall 30 and the inwardly directed wall portion 3| is an inclined wall 33which forms with an inclined inner wall 34 of head Ban inclined passage35 through which secondary air is fed on the inside of head B.

Resting upon the horizontal wall portion 3| and adjacent head B is arectangular ring 36, which serves to deflect the secondary air outwardlyagainst the flame, While at the same time securely locking the lowerunit C to the unit thereabove.

'On the second unit C andjthe succeeding units thereabove, I place onthe horizontal ledges 3| deflectors 3T. Thedeflectors 31 are eachprovided with a collar 38 encircling the vertical flange 32 and haveoutwardly inclined walls adapted to arrest upward movement of the heatedgases and to direct them outwardly against the wall of the furnace orheater. The inclination of the walls of deflectors 31 may be modified tomeet the requirements of individual heaters.

The gas supply means D may be of any suitable construction or type. Inthe illustration given, a main gas supply pipe 39 which is providedpreferably with a thermostatically controlled valve 49 communicates withan adjustable nozzle 4| which extends into a mixer head 42 of a Venturitube or primary air and gas mixing tube. The head 42 is connected bymeans of coupling 43 with the pipe 44. Pipe 44 is connected by elbow 45to the short pipe 46 a fitting 41 is screwed into burner head B andconnects pipe 46 with conduit 24 of head B. The mixer head is providedwith a bridge 48 containing a central collar 49 which is engaged by thethreaded nozzle 4|. The lock nut 50 main tains the nozzle in the desiredposition with respect to the mixer head 42.

As shown more clearly in Fig. 1, there is a constant flow gas pipe 5|which communicates with the fitting 52 by which pipe 39 is connected tonozzle 4| and is controlled by valve 53. The valve 53 may be set topermit a constant amount of gas to flow through the main gas pipe tomaintain the burner flame at a low height. The pilot light 26 .is fed bypilot gas supply pipe 54.

In the operation of the burner, gas is fed through the main burner pipe39, through nozzle 4|, into the mixer head 42 where the primary air andgas are mixed. The mixture then passes through the main gas conduit intothe conduit 24 of the burner head. The secondary airtpasses through theshutter controlled passage and into annular chamber 5. The equalizerringZ causes the air to fill the chamber 5 and to pass up-- wardly inequal volume about the inner wall 28 and thence out through passage 35to the inner side of the flame. The annular member 36 serves also toguide the secondary air toward'the inner side of the flame. It will beseen that'with this construction, substantially all of the air enteringthe furnace is brought into contact with the flame so that there is noescaping cold air which might seek a lower level in the furnace.Instead, all of the air is either burned directly in the flame, or elseforced in contact with the inner side of the flame so that it risesvertically. The rising current of air is directed by the deflectors 31succes- .sively against the walls of the heater so that the so as toclose ofi conduit 24 at a point opposite the gas inlet, I preventunequal distribution which would otherwise occur if the conduit 24 werecontinuous. Each of the burner openings 25, in the operationof theburner, receives its full quota'of air and gas mixture.

The constant flow valve maintains the burner in operation even thoughthe main gas valve is closed by a thermostat and the heat thus suppliedis sufficient for mild weather; at the same time, the flame tends toprevent the pilot light from being blown out by puffs of air created bythe operation of the thermostat, thus overcoming the possibility of anexplosion and back pressure on the draft. Upon operation of v thethermostat the sudden change in pressure and heating supplied causes airdisturbances which would be likely to extinguish the pilot flame were itnot for the flame which is fed through the constant flow valve.Extinguishment of the pilot flame would allow gas to accumulate andwould likely cause an explosion upon relighting of the burner. The flamesupplied by the constant flow valve also consumes substantially all theincoming cold air so that circulation is maintained and a stratificationof cold and warm air in the furnace is prevented.

'In the installation of the burner, the casing A together with the gassupply means D may be moved into position through the ash compartment ofthe ordinary furnace. The successive deflector units 0 may then bereadily placed in position by passing them through the main door of thefurnace. I prefer to build the units up to about the dome of the furnaceor heater, thereby causing the heated air to be deflected through itsentire vertical passage. Similarly, if it is desired to remove theburner for repair or other purposes, the deflector units may be liftedout one by one through the main door of the furnace and then the lowercasing may be withdrawn through the ash-pit or compartment.

The burner parts may be formed of any suitable materials. If desired,the base A may be formed of metal and the deflector units C may beformed of fire-resisting construction materials of well known types.

While I have shown a specific form of construction by way ofillustration, it will be understood that many changes may be made in theconstruction Without departing from the spirit of my in-- vention. Theforegoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitations should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible, in view of the prior art. 7

I claim:

1. In gas burner apparatus of the character set forth, a hollow basehaving an air inlet duct, a series of substantially identical bafflepieces supported one on another, one of saidbaflle pieces providing withthe walls ofsaid base a secondary air'passage, and a series of annularflangedeflectors supported on each of the other bafile pieces."

2. In gas burner apparatus of the character set forth, a burner headsupported on a hollow base, a series of substantially identical balllepieces supported one on top of another, said baffle pieces being flangedoutwardly and turned inwardly to form a ledge for supporting an annularring, the outwardly flanged portion of one of said pieces providing withsaid burner head an air passage opening at the top of said head.

3. In gas burner apparatus of the character set forth, a burner headsupported on a hollow base, at least two substantially identical bafllepieces supported by said base, said pieces having an inwardly steppedflange at their lower ends, said flange being adapted to fit into thetop end of a lower balfle piece, and a series'of annular deflectors eachembracing the top end of-one of said bafile pieces.

- JOHN O. JENSEN.

